[ben_w]

Plus:

Brilliant’s computer science courses cover slightly more than my actual software engineering degree from Aberystwyth university, and their maths courses cover more than I did at A-level.

The various introductions to matrices (in different contexts each time), are better than the introduction I had in my A-levels (with a good teacher!), and I would say they are of comparable goodness to 3blue1brown. Only, all of it is that good.

If you get stuck because a topic assumes knowledge you don’t yet have, they have a course to teach you what you need to learn.

I can’t comment on the levels of Brilliant’s physics, chemistry, or biology as I have only GCSEs in those subjects — but I can say they’re well-described and engaging.

Negatives:

Limited practice materials, e.g. I still suck at probability because I’m not groking the broader implications of their simpler lessons.

[treeman79]

This is neat. I was taking a Trigonometry course online. Was great at first but I kept running it references to “as we learned in Algebra or Geometry” Well dang it, I aced trigonometry in college, but apparently I have completely forgotten some basic building blocks. So I need to start back at basic algebra and work my way up to find the missing gaps.

[MartinMcGirk]

Thanks for replying! Sounds like I should try it out. My maths could use a refresher and I could use an engaging way to learn it. Much appreciated.